单选题If the current and wind are in opposite directions,the sea surface represents().Aa greatly reduced wind speedBa higher wind speed than what really existsCa lower wind speed than what really existsDmore turbulent winds
单选题
If the current and wind are in opposite directions,the sea surface represents().
A
a greatly reduced wind speed
B
a higher wind speed than what really exists
C
a lower wind speed than what really exists
D
more turbulent winds
参考解析
解析:
暂无解析
相关考题:
SHIFT OF WIND DIRECTION IN AN ANTICLOCKWISE MANNER, FOR EXAMPLE FROM NORTH TO WEST ( OPPOSITE OF VEERING ) defines ______.A.Backing (of wind)B.Veering (of wind)C.Shifting of windD.altering of wind
The best time to work a boat into a slip is ______.A.when the wind is against youB.with the current setting against youC.at slack waterD.with a cross current
Solid green arrows on the main body of a pilot chart indicate ______.A.prevailing wind directionsB.prevailing ocean current directionsC.probable surface current flowD.shortest great circle routes
Tensile stress is a result of two forces acting in ______.A.opposite directions on the same line,tending to pull the material apartB.opposite directions on the same line,tending to compress the objectC.opposite directions along parallel linesD.the same direction along parallel lines
If the current and wind are in the same direction,the sea surface represents a wind speed ______.A.lower than actually existsB.higher than actually existsC.that actually existsD.that has no proportional relationship
If the current and wind are in opposite directions,the sea surface represents ______.A.a greatly reduced wind speedB.a higher wind speed than what really existsC.a lower wind speed than what really existsD.more turbulent winds
For determining the amount of chains used in anchoring operation, which one of the following factors would’t be considered?______.A.selection of landmarksB.character of sea bottomC.strength of current and wind forceD.radius of ship swing to wind or tide
共用题干第一篇Renewable Energy SourcesToday petroleum(石油)provides around 40% of the world's energy needs, mostly fuelling automobiles.Coal is still used,mostly in power stations,to cover one-quarter of our energy needs,but it is the least efficient,unhealthiest and most environmentally damaging fossil fuel(矿物燃料).Natural gas reserves could fill some of the gap from oil,but reserves of that will not last into the 22nd century either. Most experts predict we will exhaust easily accessible reserves within 50 years.Less-polluting renewable energy sources offer a more practical long-term energy solution."Renewable"refers to the fact that these resources are not used faster than they can be replaced.Hydroelectric(水力发电的)power is now the most common form of renewable energy,suDDIvina around 20%of world electricity.China's Three Gorges Dam is the largest ever. At five times the size of the US's Hoover Dam, its 26 turbines(涡轮机)will generate the equivalent energy of 18 coal-fired power stations.It will satisfy 3% of China's entireelectricity demand.In 2003. the first commercial power station to use tidal(潮汐的)currents in the open sea opened in Norway. It is designed like windmill(风车),but others take the torm ofturbines.As prices fall,wind power has become the fastest growing type of electricity generation一quadrupling(翻两番)worldwide between 1999 and 2005. Modern wind farms consist of turbines that generate electricity.Though it will be more expensive,there is more than enoucih wind to provide the world's entire energy needs.Wind farms come in onshore and offshore forms.They can often end up at spots of natural beauty,and are often unpopular with residents.And turbines are not totally harmless一they can interfere with radar, alter climate and kill sea birds.Scotland is building Europe's largest wind tarm,wnicn will power 200.000 homes.The UK's goal is to generate one-fifth of power from renewable sources,mainly wind,by 2020.But this may cause problems,because wind is unreiiable.One of the problems with wind farms is thatA:there is not enough wind.B:wind is not reliable.C:they can only be built on the sea.D:they might influence the world economy.
单选题For determining the amount of chains used in anchoring operation,which one of the following factors wouldn’t be considered?().Aselection of landmarksBcharacter of sea bottomCstrength of current and wind forceDradius of ship swing to wind or tide
单选题Solid green arrows on the main body of a pilot chart indicate ().Aprevailing wind directionsBprevailing ocean current directionsCprobable surface current flowDshortest great circle routes
单选题A position that is obtained by applying estimated current and wind to your vessel’s course and speed is a(n) ().Aestimated positionBdead reckoning positionCfixDNone of the above
单选题You are docking a vessel.Wind and current are most favorable when they are().Acrossing your course in the same directionBcrossing your course in opposite directionsCparallel to the pier from aheadDsetting you on the pier
单选题If the current and wind are in the same direction,the sea surface represents a wind speed ().Alower than actually existsBhigher than actually existsCthat actually existsDthat has no proportional relationship
单选题Which position includes the effects of wind and current().ADead reckoning positionBLeeway positionCEstimated positionDSet position
单选题The steady current circling the globe at about 60°S is the().APrevailing WesterlyBSub-Polar FlowCWest Wind DriftDHumboldt Current
单选题The best estimate of the wind direction at sea level can be obtained from observing the direction of the().Acloud movementBvessel headingCwavesDswells
单选题A sea breeze is a wind().Athat blows towards the sea at nightBthat blows towards an island during the dayCcaused by cold air descending a coastal inclineDcaused by the distant approach of a hurricane
单选题The velocity of the wind,its steady direction,and the amount of time it has blown determines a wind driven current’s().AtemperatureBdensityCdeflectionDspeed
单选题The result of two forces acting in opposite directions and along parallel lines,is an example of what type of stress?()ATensileBCompressionCShearDStrain
单选题The best time to work a boat into a slip is().Awhen the wind is against youBwith the current setting against youCat slack waterDwith a cross current
单选题When picking up your mooring at the buoy,the correct method is to().Aapproach the buoy with the wind and current asternBapproach the buoy with the wind and current aheadCapproach the buoy with wind and sea abeamDstop upwind and up current and drift down on the buoy
单选题You will find information about the duration of slack water in the ().ATidal Current TablesBTide TablesCAmerican Practical NavigatorDSailing Directions
单选题The Rules state that certain factors are to be taken into account when determining safe speed. Those factors include().Astate of wind,sea,and current,and the proximity of navigational hazardsBmaximum attainable speed of your vesselCtemperatureDaids to navigation that are available
问答题Two men, starting at the same point, walk in opposite directions for 4 meters, turn left and walk another 3 meters. What is the distance between them?
单选题Your vessel is off a lee shore in heavy weather and laboring. Which action should you take?().APut the sea and wind about two points on either how and reduce speedBHeave to in the trough of the seaCPut the sea and wind on either quarter and proceed at increased speedDPut the bow directly into the sea and proceed at full speed